gubelniann



For the Purp0se 0f 10cking the keys 230, 176 and 35 iI1 depressed osition vvhen it iS desired t0 continue the use of these keys and the n1echa11is1T1 C0ntr011ec1 thereby for S0me time, each of these keys is r0vided vith a m0vable 10cking b10ck, 362, as shown in l ig 7. aCh 0f the e b10cks is 1II'Lnged be- 10'vv the tO Of the keyb0&rd, a(jaCe1 t0 its respective shifting key alld iS pr0vided vvith a thumb iece 363 Which iS guided in a S10t 36 (Fig 1) in the tO Of the keyboard, adjacent t0 tl e respective Shifting key and r0jects bOve the keyb0ard T 0I1 retracting the 10cking b10ck froIn above the StO S110ulder of the Shifting key, as sh0vvn in igure 16, the key can rise t0 its uppern10st )0sition, T 0Il depressing thiskey and then Shifting the 10cking b10ck S0 that it is I ranged betvveen the St01) Shou1der 4 0f the key nd the tO Of the keyb0ard aS Shown in igure 15 the key is held in a de ressed POSiti0n Each c0lumn Of number nd Work keys is provided vvith 10Cl(ing Inec11anisn1 vvhic11 revents Tnore than one key in each of these coluInns fron1 being held in a depressed OSition at the SalT1e time. This 10cking n1ech nism iS best Shown in Figures 8, 9, 10, 11 12 and 15 and is C011Str11cted aS T011OWS:

365 rePresents a number of tumblers 01' b10cks arranged in longitudina1 1'0vvs on the bott0111 0f the key-b0ard each IOW being adjacent t0 the right-hand Side Of the Ste1T1s of a res ective T0v 0 nulnber OI Wor(1 keys 1ese tuInblers are Capable Of 10ngitudina1 n10veInent -,ith references t0 the C0111Inn 0f keys and each Set of tunblers is guided on a rod 366 Which iS Supported on the key-b0ard b0tt0n1. ]aCh of the tumblers is r0vided Tvith Convex 11)Pel' Side vvhich referbly S10Pes 01' inclines fronl its higher centrl Part tovvard the front LIlCl l'ea1 sides of the tumbler in the forn1 0f aIl inverted letter v lhe 10ngitudina1 movelnent of the tulnblers is limited by front and rear StO S 367, 368 vvhich are engaged by the front LIl(1 rear tun1blers and vhich als0 Serve t0 Support the guide r0d 366 above the b0tton1 42 as shovvn in igure B The Stem of each nunlber and v0rd key is rovided on the side 0 p0site t0 its 10cking 'I)1ate 327 vvith a f0110vver 0I' SPreading hed 369 The Spreading heads of the inteTme diate key3 have a Convex underside vvhich Preferably inclines froIn its lovvest central Part t0 the front and re8r Sides 0f the head in the form Of the letter v. Eac110f the S reading heads, excepb the f0ren10st and rearIn0st'is rlanged over the Space betvveen tw0 tumblers. The heads 0f the foremqst aI1(1 l'earn OSt keys are arranged in front End in rear 0f the foremostand rearn10st-tuInblers respe0tively and these heads are in- Clined only 0Il th Side facing the adj(ent tumblei, aS Sh0vv1in 1 iguTe 8 tP0n dePres- Sing a key in any One of the coluTnns of num bel' 0I' W01'd keys, the spreading head of this key engages vvith the tunblers on opposite Si(les there0f lI1d` cr0vvds the tumblers in front ()f the 11ea(1f0rwardly and th0se in reI Of the head rear-vardly. vvhen the Shifting head has been depressed t0 its fullest extent, the foren10st tuInbler berS against the front StOP 367 and the I63'I`II10St tuInbler bears against the rear StOP 368, and the Slack bet-veen the Severl tuInblers iS fully taken 11P. In Figure 8, key number 5 is shown de- Pressed fully and the Slack between the tumblers is taken u in vvhich 0sition 0f the keys its shoulder 329 is engaged by the Catch Of the adjacent ]Ocking late and is Prevented from rising If key number 5 Was depressed errqneously and the correct key, for instance number 3 is Subsequently depressed, this COI' rect key In0ves d0wn-vardly iclly until it enggeS Or nearly engages the adjacent tumbler and When the c0rrect key reaches this POSitiol1, its releasing Can1 0I' C0nvex face engages With the adjacent 10cking late and shifts t11e San1e out Of engagement Wibh the 10cking Sh 0ulder 329 0f the depressed key I1I11I1bel 5 as Sh0-v11 in Iigure 12 thereby releasing this key and )ern1itting the SaIne t0 rise. I)uring the C0ntinued down-vard n10vement of the Correct key number 3, the spreading head Of the sanle moves d0vv11vrdly betveen the adjacent tun1blers and Shifts the same S0 as t0 take up the Slack betvveen them vhen the C0rrect key reaches the ends of its d()vn ward movement, the ame iS 10cked in this 0- Sition by the adjacent 10cking late in the same n]annel' in vvhich key number 5 Tvas re viously 10cked. The SlCk between the severl tumblers is ()I11y Suicient t0 permit Of the full depression of one key t a time and the tuInblers are S0 00I1Structed that vv11en tvv0 keys are depressed SiInultaneously these keyS lre arrested i!1 their d0-vnvvard n10ven1ent before their 10cking Shoulders are engged by the 10cking )late. By this nleans any 0Ile key in a column Inay be depressedand 10Cked in itS depressed I)0Sition, and if an inc0rrect key haS been depresse(1, the same is 1'e16ased by the Subsequent depressi0n Of the c0rrect key, and the correct key iS in tu1n l0cked in a depressed 0Sition, but the 10cking 0f tv0 keys at the same time in a depfessed 0Sition is prevented. 

